Hello all,
I have a variable XX that describes various diagnoses that my subjects might have. Diagnoses are coded using the usual ICD 8-10 codes. While most diagnoses are just numerical, some end with an alphabet, for e.g. 618A or 720H.
I can ask Stata to tell me how many subjects in my dataset have diagnoses 618 by:
count if XX==616
However how do I find out how many have a diagnoses with numbers in combination with letters (like 618A). Stata isn't able to tell me using the 'count' or 'sum' commands as above.
Thanks,
/Amal.
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